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[media] lnbh25: LNBH25 SEC controller driver

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Add DVB SEC frontend driver for STM LNBH25PQR chip.

[mchehab@osg.samsung.com: fix merge conflict:
 fe_sec_voltage_t should not be used in kernelspace anymore.
 instead, it should use enum fe_sec_voltage]
Signed-off-by: Kozlov Sergey <serjk@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Kozlov Sergey 2015-07-28 11:33:02 -03:00 committed by Mauro Carvalho Chehab
parent dacf9ce80b
commit e025273b86
5 changed files with 263 additions and 0 deletions
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9
MAINTAINERS
View file

@ -6619,6 +6619,15 @@ T: git git://linuxtv.org/media_tree.git
S: Supported
F: drivers/media/dvb-frontends/horus3a*
MEDIA DRIVERS FOR LNBH25
M: Sergey Kozlov <serjk@netup.ru>
L: linux-media@vger.kernel.org
W: http://linuxtv.org/
W: http://netup.tv/
T: git git://linuxtv.org/media_tree.git
S: Supported
F: drivers/media/dvb-frontends/lnbh25*
MEDIA INPUT INFRASTRUCTURE (V4L/DVB)
M: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
P: LinuxTV.org Project

8
drivers/media/dvb-frontends/Kconfig
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@ -713,6 +713,14 @@ comment "SEC control devices for DVB-S"
source "drivers/media/dvb-frontends/drx39xyj/Kconfig"
config DVB_LNBH25
tristate "LNBH25 SEC controller"
depends on DVB_CORE && I2C
default m if !MEDIA_SUBDRV_AUTOSELECT
help
An SEC control chip.
Say Y when you want to support this chip.
config DVB_LNBP21
tristate "LNBP21/LNBH24 SEC controllers"
depends on DVB_CORE && I2C

1
drivers/media/dvb-frontends/Makefile
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@ -57,6 +57,7 @@ obj-$(CONFIG_DVB_LGDT3305) += lgdt3305.o
obj-$(CONFIG_DVB_LGDT3306A) += lgdt3306a.o
obj-$(CONFIG_DVB_LG2160) += lg2160.o
obj-$(CONFIG_DVB_CX24123) += cx24123.o
obj-$(CONFIG_DVB_LNBH25) += lnbh25.o
obj-$(CONFIG_DVB_LNBP21) += lnbp21.o
obj-$(CONFIG_DVB_LNBP22) += lnbp22.o
obj-$(CONFIG_DVB_ISL6405) += isl6405.o

189
drivers/media/dvb-frontends/lnbh25.c Normal file
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@ -0,0 +1,189 @@
/*
* lnbh25.c
*
* Driver for LNB supply and control IC LNBH25
*
* Copyright (C) 2014 NetUP Inc.
* Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
* Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include "dvb_frontend.h"
#include "lnbh25.h"
/**
* struct lnbh25_priv - LNBH25 driver private data
* @i2c: pointer to the I2C adapter structure
* @i2c_address: I2C address of LNBH25 SEC chip
* @config: Registers configuration:
* offset 0: 1st register address, always 0x02 (DATA1)
* offset 1: DATA1 register value
* offset 2: DATA2 register value
*/
struct lnbh25_priv {
struct i2c_adapter *i2c;
u8 i2c_address;
u8 config[3];
};
#define LNBH25_STATUS_OFL 0x1
#define LNBH25_STATUS_VMON 0x4
#define LNBH25_VSEL_13 0x03
#define LNBH25_VSEL_18 0x0a
static int lnbh25_read_vmon(struct lnbh25_priv *priv)
{
int i, ret;
u8 addr = 0x00;
u8 status[6];
struct i2c_msg msg[2] = {
{
.addr = priv->i2c_address,
.flags = 0,
.len = 1,
.buf = &addr
}, {
.addr = priv->i2c_address,
.flags = I2C_M_RD,
.len = sizeof(status),
.buf = status
}
};
for (i = 0; i < 2; i++) {
ret = i2c_transfer(priv->i2c, &msg[i], 1);
if (ret >= 0 && ret != 1)
ret = -EIO;
if (ret < 0) {
dev_dbg(&priv->i2c->dev,
"%s(): I2C transfer %d failed (%d)\n",
__func__, i, ret);
return ret;
}
}
print_hex_dump_bytes("lnbh25_read_vmon: ",
DUMP_PREFIX_OFFSET, status, sizeof(status));
if ((status[0] & (LNBH25_STATUS_OFL | LNBH25_STATUS_VMON)) != 0) {
dev_err(&priv->i2c->dev,
"%s(): voltage in failure state, status reg 0x%x\n",
__func__, status[0]);
return -EIO;
}
return 0;
}
static int lnbh25_set_voltage(struct dvb_frontend *fe,
enum fe_sec_voltage voltage)
{
int ret;
u8 data1_reg;
const char *vsel;
struct lnbh25_priv *priv = fe->sec_priv;
struct i2c_msg msg = {
.addr = priv->i2c_address,
.flags = 0,
.len = sizeof(priv->config),
.buf = priv->config
};
switch (voltage) {
case SEC_VOLTAGE_OFF:
data1_reg = 0x00;
vsel = "Off";
break;
case SEC_VOLTAGE_13:
data1_reg = LNBH25_VSEL_13;
vsel = "13V";
break;
case SEC_VOLTAGE_18:
data1_reg = LNBH25_VSEL_18;
vsel = "18V";
break;
default:
return -EINVAL;
}
priv->config[1] = data1_reg;
dev_dbg(&priv->i2c->dev,
"%s(): %s, I2C 0x%x write [ %02x %02x %02x ]\n",
__func__, vsel, priv->i2c_address,
priv->config[0], priv->config[1], priv->config[2]);
ret = i2c_transfer(priv->i2c, &msg, 1);
if (ret >= 0 && ret != 1)
ret = -EIO;
if (ret < 0) {
dev_err(&priv->i2c->dev, "%s(): I2C transfer error (%d)\n",
__func__, ret);
return ret;
}
if (voltage != SEC_VOLTAGE_OFF) {
msleep(120);
ret = lnbh25_read_vmon(priv);
} else {
msleep(20);
ret = 0;
}
return ret;
}
static void lnbh25_release(struct dvb_frontend *fe)
{
struct lnbh25_priv *priv = fe->sec_priv;
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
lnbh25_set_voltage(fe, SEC_VOLTAGE_OFF);
kfree(fe->sec_priv);
fe->sec_priv = NULL;
}
struct dvb_frontend *lnbh25_attach(struct dvb_frontend *fe,
struct lnbh25_config *cfg,
struct i2c_adapter *i2c)
{
struct lnbh25_priv *priv;
dev_dbg(&i2c->dev, "%s()\n", __func__);
priv = kzalloc(sizeof(struct lnbh25_priv), GFP_KERNEL);
if (!priv)
return NULL;
priv->i2c_address = (cfg->i2c_address >> 1);
priv->i2c = i2c;
priv->config[0] = 0x02;
priv->config[1] = 0x00;
priv->config[2] = cfg->data2_config;
fe->sec_priv = priv;
if (lnbh25_set_voltage(fe, SEC_VOLTAGE_OFF)) {
dev_err(&i2c->dev,
"%s(): no LNBH25 found at I2C addr 0x%02x\n",
__func__, priv->i2c_address);
kfree(priv);
fe->sec_priv = NULL;
return NULL;
}
fe->ops.release_sec = lnbh25_release;
fe->ops.set_voltage = lnbh25_set_voltage;
dev_err(&i2c->dev, "%s(): attached at I2C addr 0x%02x\n",
__func__, priv->i2c_address);
return fe;
}
EXPORT_SYMBOL(lnbh25_attach);
MODULE_DESCRIPTION("ST LNBH25 driver");
MODULE_AUTHOR("info@netup.ru");
MODULE_LICENSE("GPL");

56
drivers/media/dvb-frontends/lnbh25.h Normal file
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@ -0,0 +1,56 @@
/*
* lnbh25.c
*
* Driver for LNB supply and control IC LNBH25
*
* Copyright (C) 2014 NetUP Inc.
* Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
* Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef LNBH25_H
#define LNBH25_H
#include <linux/i2c.h>
#include <linux/kconfig.h>
#include <linux/dvb/frontend.h>
/* 22 kHz tone enabled. Tone output controlled by DSQIN pin */
#define LNBH25_TEN 0x01
/* Low power mode activated (used only with 22 kHz tone output disabled) */
#define LNBH25_LPM 0x02
/* DSQIN input pin is set to receive external 22 kHz TTL signal source */
#define LNBH25_EXTM 0x04
struct lnbh25_config {
u8 i2c_address;
u8 data2_config;
};
#if IS_REACHABLE(CONFIG_DVB_LNBH25)
struct dvb_frontend *lnbh25_attach(
struct dvb_frontend *fe,
struct lnbh25_config *cfg,
struct i2c_adapter *i2c);
#else
static inline dvb_frontend *lnbh25_attach(
struct dvb_frontend *fe,
struct lnbh25_config *cfg,
struct i2c_adapter *i2c)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
#endif
#endif